Hoist



July 5, 1938.

FIG.

All

II II j 4" IF C. B. COLLINS HOIST Filed April 28, 1937 FIC5.4.

. INVENTOR: CHARLES B. COLLINS ATTORNEY.

Patented July 5, 1938 UNITED STATES PATENT OFFICE nors'r v Charles B.Collins, San Anselmo, Calif. Application April 2a, 1937, Serial No.129,445

3 Claims.. (01(187-6) This invention relates to improvements in hoists,and more particularly, to hoists for fire fighting purposes.

Among the objects of the present invention is to provide quick access tothe roof and upper floors of buildings from the exterior thereof so asto expedite the fighting of fires caused by incendiary bombs.

Another object is to reduce the unit cost of the hoist by providing ademountable hoist platform and separable means which may be used inconjunction with any one of a plurality of hoist installations. 1

Another object is to render the permanent portion of the hoist structuresightly and inconspicu- 011s in appearance so as not to deface theappearance of the building to which it is applied.

Other objects and advantages appear as the description progresses.

In this specification and the accompanying drawing, the invention isdisclosed in its preferred form. It is, however, to be understood thatit is not limited to this form, because it may be embodied in otherforms within the purview of the claims following the description.

In the one sheet of drawings:

Fig. 1 is a side elevation of a hoist assembly constructed in accordancewith this invention. The apparatus is shown in operation.

Fig. 2 is a front view of the pulleys at the upper end of the hoist.

Fig. 3 is an enlarged side elevation view partly in vertical sectionillustrating the traveling mem ber of the hoist.

Fig. 4 is a further enlarged horizontal section of the same taken alongthe line IV-IV in Fig. 3 with the hoist platform removed.

Fig. 5 is a detailed view in horizontal section showing the method ofincorporating the guide member in a new building.

In detail, the construction illustrated in the drawing, referring moreparticularly to Fig. 1, comprises the hollow guide member formed 'by thepipes I interconnected and vertically mounted on the face 2 of abuilding by the T-couplings 3. The continuous slot 4 is provided throughthe pipe member I and the T-couplings 3 and extends from top to bottomof the assembled guide. In the case of buildings to be constructed inthe future, the guide member may be countersunk in the face of thebuilding 2' as indicated at I in Fig. 5. The permanent portion of thehoist structure in this form is rendered invisible thus effectuallypreventing marring of the architectural design of the building.

The traveler 5 is located within the guide I and has the rollers 6 and lat the upper and bottom portions thereof respectively engaging theinterior of the pipe I, refer to Figs. 3 and4. The rollers are centrallylocated with respect to the transverse center line of the piping. Thetraveler 5 is offset on one side relative to the rollers. This leavesclearance on the opposite side of the rollers for purposes to be laterdescribed. The bracket 8 integral with the traveler 5 extends forwardly10 therefrom through the slot 4; The bracket has the lateral arms 9 andIll projecting from opposite sides thereof adjacent the guide I. Thebolt shanks II, I2, and I3 are fixed in the end of the arms 9 and I0 andthe forward end of the bracket 8 respectively.

The platform I4 rests on the bracket 8 and is firmly secured thereto bythe nuts I5. I5 and I! threaded on the shanks I I, I2, and I3. For rapidassembly, the nuts I5 to Il may be in the form of hand wheels. Theplatform I4 need only be sufficiently large to accommodate one persontogether with chemical equipment for use in quenching the blaze. Theplatform is provided with the usual hand rails I3.

The upper portion IQ of the traveler 5 is aligned with the axis of theguide. The lower end of the cable 20 is connected to the upper end I9 ofthe traveler by means of the union 2|. The cable 20 extends upwardthrough the open upper end of the guide I and passes around the pulley22.

The pulley 22 is mounted in the bracket 23, which is fixed on theparapet 24 of the building. The guide pulleys 25, 26 are similarlymounted on the bracket 23. The pulley 25 guides the upwardly extendingportion of the cable 20 from the axis of the guide I to the periphery ofthe pulley 22. The pulley 26 guides the fall of the cable 20 from thepulley 22 back into the guide I, bringing it into the position indicatedin Fig. 4. The clearance provided on one side of the rollers 6 and 1 aspreviously described allows room for the passage of the fall of thecable 20.

The lower end of the cable 20 passes around the pulley 21 which isanchored to the face of the 5 building by the yoke 28. From the pulley21,

the cable passes to thesheave 29 on the motor truck 30. Conventionalmeans, well known to those skilled in the art, are employed for drivingthe sheave 29 from the motor of the truck 30.

The invention operates substantially as follows:

The platform I4 is first secured on thebrackets 8 by means of the handscrews I5, I1. The free end of the cable 20 is wound on the sheave 29.

wheels of the truck to prevent its movement during the operation of thehoist. The firefighting equipment is loaded on the platform It. Thesheave I! is then rotated by the motor of thetruck ll so as to wind upthe cable 20. This raises the platform II. when the platform has risento the height desired, the rotation of the sheave fl is discontinued,halting the movement of the platform and enabling the man thereon toproceed to the exact location of the blaze.

After the fire is subdued, the sheave 28 is operated so as to lower theplatform II to its lowermost position. The hand nuts l5-I'I are thenremoved; permitting the platform, It to be demounted from its supportingbracket 8 and to be stowed on the truck III. The free end of the cableis removed from the sheave 29 and may be coiled up within a covered pitsuch as is indicated at I below the level of the sidewalk. The traveler5 and its projecting bracket 8 may be raised above the reach ofpassersby by manually pulling the cable 20 downward.

It will be seen that the only separate equipment required for individualbuildings is the relatively inexpensive hollow guide, the cable 20, andits pulleys. This structure is relatively inconspicuous and may beentirely concealed in the face of new buildings as in the modificationshownin' Fig. 5.

Having thus described the invention, what is 'claimed and desired to besecured by Letters Patent is:

1. A hoist including a vertical tubular guide having a longitudinal slottherein; a traveler within said guide; rollers at the top and bottom ofsaid traveler engaging the interior ,of said guide; said traveler beingoffset with respect to said rollers to provide clearance between theoppositeside of said rollers and the adjacent inte- -rior wall of saidguide; the top of said traveler being located on the axis of said guide;a pulley mounted at the upper end of said guide; a cable connected tothe top of said traveler and extending upwardly therefrom, passingaround said roller, and extending downwardly through said hollow guidemember through the clearance provided between said rollers and theadlacent interior walls of said hollow guide; and motive means engagingthe free end of said cable.

2. A hoist including a vertical tubular guide member having alongitudinal slot therein; a traveller within said guide member; rollersmounted at the top and bottom of said traveller and engaging theinterior of said guide, said rollers being of a width sufficient toextend across said slot and engage the interior of said guide onopposite sides thereof; a bracket fixed on said traveller and extendinglaterally therefrom through said slot; a pair of opposed arms extendinglaterally from said bracket; 9, platform adapted to rest on said bracketand said arms: and threaded means located at the end of said bracket andeach of said arms for detachably securing the platform thereto.

3. A hoist including a vertical tubular guide open at top and bottom andhaving a longitudinal slot therein; a traveller within said guide;rollers at the top and bottom of said traveller engaging the interior ofsaid guide; said traveller being oflset with respect to said rollers toprovide clearance between the opposite side of said rollers and theadjacent interior wall of said guide; a pulley of larger diameter thansaid tubular guide mounted above the open upper end of said guide; acable connected to the top of said traveller and extending upwardlytherefrom, passing around said roller, and extending downwardly throughthe clearance provided between said rollers and the adjacent interiorwall of said tubular guide; a pair of opposed pulleys engaging saidcable intermediate the first mentioned pulley and the end of said guideand operating to guide said cable from the larger diameter of said firstpulley into the smaller interior of said guide; and motive meansengaging the free end of said cable.

